<!DOCTYPE html>
<!--
     Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/publicdomain/zero/1.0/
-->
<html>
<head>
  <title>CSS Reference</title>
  <style>
    div {
      border: 1px solid black;
      width:  40px;
      height: 50px;
      margin: 1px;
      float: left;
    }
    br { clear: both; }
  </style>
</head>
<body>
  <!-- left top: -->
  <div style="background: radial-gradient(circle 40px at left top,
                                          blue, yellow)"></div>
  <div style="background: radial-gradient(circle 40px at left top,
                                          blue, pink 30%, yellow)"></div>
  <!-- center top: -->
  <div style="background: radial-gradient(circle 40px at center top,
                                          blue, yellow)"></div>
  <div style="background: radial-gradient(circle 40px at center top,
                                          blue, pink 30%, yellow)"></div>
  <!-- right top: -->
  <div style="background: radial-gradient(circle 40px at right top,
                                          blue, yellow)"></div>
  <div style="background: radial-gradient(circle 40px at right top,
                                          blue, pink 30%, yellow)"></div>
  <br>

  <!-- left center: -->
  <div style="background: radial-gradient(circle 40px at left center,
                                          blue, yellow)"></div>
  <div style="background: radial-gradient(circle 40px at left center,
                                          blue, pink 30%, yellow)"></div>
  <!-- center center: -->
  <div style="background: radial-gradient(circle 40px at center center,
                                          blue, yellow)"></div>
  <div style="background: radial-gradient(circle 40px at center center,
                                          blue, pink 30%, yellow)"></div>
  <!-- right center: -->
  <div style="background: radial-gradient(circle 40px at right center,
                                          blue, yellow)"></div>
  <div style="background: radial-gradient(circle 40px at right center,
                                          blue, pink 30%, yellow)"></div>
  <br>

  <!-- left bottom: -->
  <div style="background: radial-gradient(circle 40px at left bottom,
                                          blue, yellow)"></div>
  <div style="background: radial-gradient(circle 40px at left bottom,
                                          blue, pink 30%, yellow)"></div>
  <!-- center bottom: -->
  <div style="background: radial-gradient(circle 40px at center bottom,
                                          blue, yellow)"></div>
  <div style="background: radial-gradient(circle 40px at center bottom,
                                          blue, pink 30%, yellow)"></div>
  <!-- right bottom: -->
  <div style="background: radial-gradient(circle 40px at right bottom,
                                          blue, yellow)"></div>
  <div style="background: radial-gradient(circle 40px at right bottom,
                                          blue, pink 30%, yellow)"></div>
</body>
</html>
